VB4 Expal Vapour Barrier

4mm thick, robust, torch-applied, elastomeric bitumen vapour barrier, featuring a tear resistant aluminium foil lining for vapour impermeability. 

Technical data
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Roll size (m) 1 x 7.5
Weight (Kg/m²) 4.5
Thickness (mm) 3.5
Surface finish Top: Mica
Bottom: Foil
Reinforcement Aluminium foil + 60g/m2 glass fleece
Tensile strength (EN 12311-1) Length ≥ 400N/50mm
Diagonal ≥ 400N/50mm
Heat stability °C (EN 1110) +70
Cold bending  °C (EN 1109) -20